The Ministry of Transport contracted JEVIC NZ Ltd to provide relevant information and data from vehicles undergoing emissions tail pipe testing in Japan. This work has helped inform the development of metered emissions testing on imported vehicles to New Zealand. JEVIC provided a report (PDF v7.0, 334kb) and raw data which the Ministry of Transport has turned into the following graphs. If you have any questions about these graphs please email emissions@transport.govt.nz.

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Results of testing 108 diesel vehicles in Japan - Percentage black smoke in the exhaust gas by odometer reading

Results of testing 108 diesel vehicles in Japan - Percentage black smoke in the exhaust gas by year of manufacture

Results of testing 3000 petrol vehicles in Japan - Hydrocarbons in the exhaust gas by odometer reading

Results of testing 3000 petrol vehicles in Japan - Hydrocarbons in the exhaust gas by year of manufacture

Results of testing 3000 petrol vehicles in Japan - Percentage of carbon monoxide in the exhaust gas by odometer reading

Results of testing 3000 petrol vehicles in Japan - Percentage of carbon monoxide in the exhaust gas by year